Jmeter - BeanSell 后置处理器 结合 HttpClient 使用

背景：在后置处理器中发送POST 请求，请求体为JSON数据

疑问：
1.如果获取Cookie？

2.HttpClient 怎么发送POST?

3.HttpClient 怎么添加Cookie？

解决：
1.如果获取Cookie？

import org.apache.jmeter.protocol.http.control.CookieManager;
import org.apache.jmeter.protocol.http.control.Cookie;

// 获取当前线程的Cookie管理器
CookieManager manager = ctx.getCurrentSampler().getCookieManager();

// 遍历所有Cookie
for (int i = 0; i < manager.getCookieCount(); i++) {
    Cookie cookie = manager.get(i);
    log.info("Cookie Name: " + cookie.getName() + " Cookie Value: " + cookie.getValue());
}

2.HttpClient 怎么发送POST?

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;


String json = "{\"key1\":\"value1\",\"key2\":\"value2\"}";
String url = "http://httpbin.org/post";

CloseableHttpClient httpClient = HttpClientBuilder.create().build();
try {
    StringEntity entity = new StringEntity(json);
    entity.setContentType("application/json");

    // 创建POST请求
    HttpPost post = new HttpPost(url);
    post.setEntity(entity);

    // 执行请求
    CloseableHttpResponse response = httpClient.execute(post);

    // 获取响应内容
    String result = EntityUtils.toString(response.getEntity());
    System.out.println(result);

    // 关闭响应
    response.close();
} catch (IOException e) {
    e.printStackTrace();
} finally {
    try {
        httpClient.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

https://jmeter.apache.org/api/org/apache/jmeter/protocol/http/control/Cookie.html

3.HttpClient 怎么添加Cookie？

import org.apache.http.client.CookieStore;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.cookie.BasicClientCookie;
import org.apache.http.util.EntityUtils;
 
import java.io.IOException;
 
public class HttpClientCookieExample {
    public static void main(String[] args) {
        // 创建一个Cookie存储对象
        CookieStore cookieStore = new BasicCookieStore();
 
        // 创建一个包含cookie存储的HttpClientContext对象
        HttpClientContext context = HttpClientContext.create();
        context.setCookieStore(cookieStore);
 
        // 添加一个cookie
        BasicClientCookie cookie = new BasicClientCookie("name", "value");
        cookie.setDomain("example.com");
        cookie.setPath("/");
        cookieStore.addCookie(cookie);
 
        // 使用HttpClient
        try (CloseableHttpClient httpClient = HttpClients.custom().setDefaultCookieStore(cookieStore).build()) {
            // 构建HttpGet对象
            HttpGet httpGet = new HttpGet("http://example.com");
 
            // 执行请求
            CloseableHttpResponse response = httpClient.execute(httpGet, context);
 
            // 打印响应内容
            System.out.println(EntityUtils.toString(response.getEntity()));
 
            // 关闭响应对象
            response.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}